"That unwelcome burst of wintry precipitation was the result of a series of factors, including cold air in the upper atmosphere. The moisture was also elevation dependent, so areas like the Dundalk Highlands would have seen accumulating snow."

Rain began in the afternoon hours on Monday and continued through the overnight and early morning hours, bringing around 20 mm to parts of Toronto and more than 35 mm to the Trenton area.

Residents will be able to pack their rain boots away for a short while, with a brief warm up expected later this week.

"Southern Ontario is in for a temperature roller coaster ride over the next week, but significant warm up is expected on Thursday as a result of an incoming system," Vaswani says, adding that temperatures are forecast to climb into the teens.

"However, the amount of warm weather we see will be dependent on when the precipitation arrives."

The mild temps will be accompanied by gusty winds.

Things will take a slight dip after that, but there's the potential for another warm up later this weekend.